Founded in 1986, STILLEN is recognized as one of the premier tuners in the world. With engineers and a full R&D department on site, ASE certified mechanics on staff and world renowned sales team, STILLEN's depth of knowledge about vehicle performance and automotive customizing is unparalleled. Although we are best known for our Nissan performance parts, we also sell a variety of performance parts for many other car, truck & SUV manufacturers for both street and track applications. From Ford and Chevy to Scion and Subaru and every vehicle manufacturer in between, STILLEN is the trusted source for premium quality aftermarket parts and accessories.

Racing Heritage

Not only has STILLEN been a leader in the automotive industry for over 30 years, but our founder, Steve Millen, is a world champion racecar driver. During his career, he won many prestigious races including the 24 hours of Le Mans, 24 hours of Daytona and 12 hours of Sebring. Today, he continues to be heavily involved with the product development and manufacturing of STILLEN parts.

Expert Performance Parts Manufacturer

STILLEN R&D has earned a reputation of excellence for developing innovative aftermarket parts. Each part STILLEN produces is designed and manufactured in the USA by our expert craftsmen and comes with an industry leading warranty. Most importantly, all STILLEN performance parts are designed to bring out the true character of your vehicle and remind you why you love driving!

Respected Performance Shop

A point of pride here at STILLEN is our in-house performance shop, which is open to the public and specializes in a wide variety of services for all types of vehicles. From supercharger installs to clutch replacements, dyno testing and everything in between you can trust the experts at the STILLEN performance shop to service your vehicle correctly and in a timely manner! For a full list of services we offer, please visit our performance shop page.

Trusted Seller

STILLEN is well respected within the automotive industry as an expert performance part retailer and only carries quality brands that are equally well respected. Because of our experience and reputation, STILLEN is an authorized retailer and installer of the following brands:

Contact Us

If you have any additional questions about STILLEN, the performance parts we manufacturer, the aftermarket parts we carry, or about the STILLEN performance shop, please do not hesitate to contact us. You can reach us by calling (866) 250-5542 or emailing us at Sales@stillen.com. We look forward to your questions and helping you select the correct performance parts for your vehicle and driving needs.